Zephyr builds: revert to latest ci image once fix is available

[bhess]

Zephyr builds in CI fail since about a week, while the liboqs changes in the builds seem unrelated to zephyr.

The timing coincides with a zephyr container update https://github.com/zephyrproject-rtos/docker-image/pkgs/container/ci/282662529?tag=main-amd64.

I haven't found the root cause of the build failure, but zephyrproject-rtos/docker-image#205 suggests there might be an issue with the SDK used in the container image and the recommendation is to downgrade to v0.26.14. Do you have any insight here @Frauschi ?

[bhess]

Workaround by downgrading to 0.26.14 proposed in PR #1949

[Frauschi]

Just looked into it. As indicated in zephyrproject-rtos/docker-image#205, this should (hopefully) be a temporary issue. The fix is already merged in the upstream SDK repo, so only the docker image must be updated.

Your workaround in #1949 should be totally fine until the SDK container is fixed.

[bhess]

Thanks for the confirmation @Frauschi.

[bhess]

Keeping the issue open to revert #1949 once an updated container is available.

[Frauschi]

I just opened a PR (#1953) to switch back to the latest container, as there is a new container resolving the issue.